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arXiv 1704.00780gr-qcastro-ph.GAhep-th
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作为量子引力的MOND

MOND as a regime of quantum gravity

Lee Smolin

摘要:

我们提出,有一个制度的量子引力的现象,在这种情况下,宇宙学常数是小的和积极的,这涉及的现象,在温度低于deSitter温度,或长度尺度大于视界。我们观察到等效原理的标准形式在这种情况下不适用;相反,我们认为等效原理的一种弱化形式可能成立,其中引力质量与惯性质量之比是环境和全局参数的函数。我们考虑可能的原则来确定该函数。这些导致的行为,在限制的hbar为零和光速是采取无穷大,再现修改牛顿动力学首先提出的米尔格罗姆。因此,MOND被阐明为编码一个新的量子引力现象的物理机制。我们还提出了一个有效的描述这个政权的双度量理论,有效的近似度量是静态的。这预示了一种新的效应,它改变了径向运动的引力。

英文摘要:

We propose that there is a regime of quantum gravity phenomena, for the case that the cosmological constant is small and positive, which concerns phenomena at temperatures below the deSitter temperature, or length scales larger than the horizon. We observe that the standard form of the equivalence principle does not apply in this regime; we consider instead that a weakened form of the equivalence principle might hold in which the ratio of gravitational to inertial mass is a function of environmental and global parameters. We consider possible principles to determine that function. These lead to behaviour that, in the limit of hbar to zero and the speed of light is taken to infinity, reproduces the modifications of Newtonian dynamics first proposed by Milgrom. Thus MOND is elucidated as coding the physics of a novel regime of quantum gravity phenomena. We propose also an effective description of this regime in terms of a bi-metric theory, valid in the approximation where the metric is static. This predicts a new effect, which modifies gravity for radial motions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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